Question

Carla makes $20 for each lawn she mows. The money she makes depends on the

number of lawns she mows.
How much money will she make if she mows 5 lawns? Follow the steps to write and
solve an equation to represent the situation and solve the problem.
1. Let y represent the money Carla makes and x represent the number of lawns she
mows. Write an equation that represents this situation. Tell which variable is the
independent variable. Explain how you know.

2. Since Carla mows 5 lawns, substitute 5 for x in the equation you wrote. Then simplify the resulting equation. Show your work.

3. How much money does Carla earn for mowing 5 lawns?

Answer 1

Answer: 1: y = 20x, 2: y = $100, 3: $100

Explanation:

1. y = 20x

x is the independent variable, since it is the one that controls the change in y. (as a further note, in most scenarios, when there isn't a z-axis, x will be the independent axis).

2. y = 20x

y = 20(5)

.: y = $100

3. Carla earns $100 from mowing 5 lawns